Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2021-4158

NULL Pointer Dereference

Published: Aug 24, 2022 | Modified: Nov 21, 2024
CVSS 3.x
6
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
6 LOW
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Ubuntu
LOW
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-4158
CWEhttps://cwe.mitre.org/data/definitions/476.html

A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

Weakness

The product dereferences a pointer that it expects to be valid but is NULL.

Affected Software

Name Vendor Start Version End Version
Qemu Qemu 6.0.0 (including) 7.0.0 (excluding)
Red Hat Enterprise Linux 8 RedHat virt-devel:rhel-8060020220408104655.d63f516d *
Red Hat Enterprise Linux 8 RedHat virt:rhel-8060020220408104655.d63f516d *
Red Hat Enterprise Linux 9 RedHat qemu-kvm-17:7.0.0-13.el9 *
Qemu Ubuntu devel *
Qemu Ubuntu impish *
Qemu Ubuntu jammy *
Qemu Ubuntu trusty *

Potential Mitigations

References

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